This all comes down to "Can Sentinel's rust gun affect organics" and "Can his sword cut the hulk?" If the answer is yes to either of them, then the Hulk dies. If it is no to both of them, then Sentinel becomes scrap. However, Sentinel seems to be a vastly more skilled fighter than anyone Hulk has met, including Thor. He was able to hold his own, with seeming ease, against both the military and every last autobot on earth at once. And once he and Optimus were alone, he stomped Optimus pretty handily. This could make for a difficult fight for the Hulk, given that another warrior who had finesse over him; that being Thor, was able to give him trouble even when Thor was mostly trying to restrain him with a blunt weapon. Sentinel will be trying to kill him with an edged weapon that went through Optimus pretty easily.

This all comes down to "Can Sentinel's rust gun affect organics" and "Can his sword cut the hulk?" If the answer is yes to either of them, then the Hulk dies. If it is no to both of them, then Sentinel becomes scrap. However, Sentinel seems to be a vastly more skilled fighter than anyone Hulk has met, including Thor. He was able to hold his own, with seeming ease, against both the military and every last autobot on earth at once. And once he and Optimus were alone, he stomped Optimus pretty handily. This could make for a difficult fight for the Hulk, given that another warrior who had finesse over him; that being Thor, was able to give him trouble even when Thor was mostly trying to restrain him with a blunt weapon. Sentinel will be trying to kill him with an edged weapon that went through Optimus pretty easily.

great analysis, I go with Sentinel coz of the injuries Hulk seemed to sustain, especially the Incredible Hulk (Ed Norton).